Hexafluoride Ring Main Unit

● Main application

XGN15-12 Type Hexafluoride Ring Main Unit Suitable for AC 50HZ and 12kV power systems, widely used in industrial and civil cable ring networks and power supply terminal projects, especially suitable for urban residential areas, small secondary substations, switching stations, industrial and mining enterprises, shopping malls, airports, subways, wind power generation, hospitals, stadiums, railways, tunnels and other places.

● Conditions of use

▶Altitude :≤ 1000 m. (If have special requirements, please indicate them when ordering)

▶Environment temperature:-25~40℃

▶The average daily relative humidity：≤95%

▶The average monthly relative humidity：≤90%;

▶shock resistance degree：8 degree

▶Places free from violent vibration, impact, fire, chemical corrosion and explosion.

● Model and meaning

● Criterions meet

XGN15-12 type Hexafluoride Ring Main Unit Meet the following criterions:

IEC298 ·IEC265 ·IECL29 ·IEC694 ·IEC420 ·IEC56 ·IEC529 ·IEC932 ·GB3804 ·GB3906 ·GB11022

● Technical parameters and dimension

● Structure and basic components of load switch cabinet

◆ XGN15-12 type Hexafluoride Ring Main Unit structure :Bus room+load switch cable room+operating mechanism+interlocking mechanism and low-voltage control room

◆ Load switch

A three-station load switch is installed in the switch room. The shell of the load switch is made of epoxy resin and filled with sulfur hexafluoride (SF). ) The gas is an insulating medium, and SF can be installed in the switch room according to customer's requirements. Gas density meter or gas density meter with alarm contact.

◆ Cable room

The load switch cabinet has ample cable room, which is mainly used for cable connection, so that single-core or three-core cables can be connected by simple unshielded cable heads, and at the same time, lightning arrester, current transformer, lower grounding switch and other elements can be installed in ample space. According to the standard design, the cupboard door has observation window and safety interlock device, and the bottom plate of cable room is equipped with sealing cover and cable clamp with support frame of appropriate size. The bottom plate and front door frame of the cable room can be removed to facilitate cable installation.

◆ Kneading mechanism, interlocking mechanism and low-pressure control room

The low-voltage room with interlock plays the role of control panel at the same time. The low-voltage chamber is equipped with spring operating mechanism with position indicator, mechanical interlock and device, and can also be equipped with auxiliary contacts, tripping coil, emergency tripping mechanism, capacitive live display, key lock and electric operating device. At the same time, the space in the low-voltage chamber can also be equipped with control circuit, measuring instrument and protective relay. The 750mm wide cabinet has two identical low-voltage chambers, which can be equipped with more accessories. The whole XGN15 switch cabinet can be divided into two parts, the upper part of the cabinet includes bus room, load switch, operating mechanism and low-voltage room, which is separated from the lower cable room. Therefore, the equipment installed in the upper unit can be safely and conveniently overhauled and reformed, and the whole upper unit can be replaced.

◆ Bus room

The bus room is arranged in the upper part of the cabinet. In the bus room, the main buses are connected together and run through the whole row of switch cabinets

◆ Basic components ofXGN15-12 Type Hexafluoride Ring Main Unit

▶FLN36 switch is developed and produced by the company by introducing foreign technology and according to the requirements of domestic power system.

▶The load switch has three states: closing, opening and grounding. The dynamic and static contacts of the load switch are placed in the die-casting epoxy resin shell with reinforced structure, and SF. The gas is the arc extinguishing medium, and the air pressure is 14bar. Each load switch is sealed and maintenance-free, and the barometer can be selected separately. The typical installation method of load switch in ring network cabinet is to place a steel partition between cable room and bus room and install it horizontally. This installation method isolates the bus room from the cable room to meet the most stringent safety requirements for operation and maintenance. If arc occurs inside, there is a structural weak point at the back of the load switch shell, which will be washed away, and then the arc discharge valve on the cabinet will be washed away and the over pressure air flow will be guided outside the cabinet.

▶ The load switch has two operating mechanisms：Single spring operating mechanism (K-type) and double spring operating mechanism (A-type), the electric mechanism can be added to the above two types of operating mechanisms to realize remote electric control.